13406781744 has 50 divisors (see below), whose sum is σ = 38803119740. Its totient is φ = 4468926816.

The previous prime is 13406781743. The next prime is 13406781763. The reversal of 13406781744 is 44718760431.

13406781744 is a `hidden beast` number, since 1 + 3 + 406 + 78 + 174 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13406781744.

It is not an unprimeable number, because it can be changed into a prime (13406781743) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5171074 + ... + 5173665.

Almost surely, 2^13406781744 is an apocalyptic number.

It is an amenable number.

13406781744 is an abundant number, since it is smaller than the sum of its proper divisors (25396337996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13406781744 is a wasteful number, since it uses less digits than its factorization.

13406781744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10344759 (or 10344744 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 13406781744 in words is "thirteen billion, four hundred six million, seven hundred eighty-one thousand, seven hundred forty-four".